Taper-turning mechanism.



J. HARTNESS. TAPBR TURNING MECHANISM.

1,036,104. uruoumn mum snruz. e, 1911. Patented Aug. 20 1912- 3 SHEETS-SHEET 1.

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J. HARTNESS. TAPBR TURNING MECHANISM.

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APPLIOATIOH FILED SEPT. 6, 1911. 1 036,101 Patented Aug. 20, 1912. 9 3 SHEETS-SHEET 3.

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TAPER-TURNI'NG MECHANISM.

Specification of Letters Patent. Patented Aug. 20, 1912.

Application tiled September 6, 1911. Serial No. 647,874.

set forth in my previous atent bein utilized for this purpose. he cross-sliding head 18 is provided with apower-driveii spindle it) having a chuck 20 in which the work to be tapered may be clamped, a piece at El. lhemechir To all whom it may concern Be it known that l, J arms l-l-m'rnnss. a citizen of the United St-at.es,'and resident of; Springfield. in the countyof \"indsor and State of Vermont, have invented certain new and useful Improvements in 'laperoih'firk being indicated 'lurning Mechanism, of (which the followinsm for ellecting the forward and reverse ing is a specification.

This invention has relation to taper-turning tools and has for its object to provide anattachment which may be employed in connection with lathes such as that illustrated in Letters Patent No. 792,591.;1' timed to me the twentieth day of June, 1905.

The invention contemplates a templet arranged it'Y'Siitit. substantially parallel with "'nal movement of the tool carriage ft 'oving the headstock. and therefore the wit h, crosswise or laterally with reference to the cutter. llloterring to the drawings: F igure 1 represents in plan view my tapcrturning attachment and a portion oi the lathe upon which it. is mounted. Fig. 2 represents a side elevation of the same. Fig. 3 represents an enlarged section on the line 3-3 of Fig. 1. Fig. 4 represents a section on the line 1-4 of Fig. 3. Fig. 5 represents a section on the line 5-t) o-l Fig. 2). Fig. (i shows the means the telecross-sliding movement. of the head includes a feed screw 22 (see Fig. 3) which is engaged with a nut. .21 formed on Or secured to the under side of the head. lhe feed screw has an unthreaded slotted portion on which is splined a portion of the. gearing which efi'ects its rotation, and it may also be rotated manually. Any suitable gearing may be utilized for this purpose, such as that. illustrated in my previous patent. .As shown in the present drawings, it includes a worm wheel 25 splined on the unthreaded portion 22 of the feed screw. A worm 26 on a power-driven shaft 27 may be engaged with the worm wheel for ctl'ect-ing the rotation of the feed screw in one direction. .llelow the worm there is a second worm wheel .28 with which the worm may be engaged. and from said worm wheel power is transmitted tothe teed screw through the intermediate on the unthreaded portion 22 ot the feed screw. 'lhe gearing which I. have described or connecting is located in a suitable chamber termed in scoping rod with the tool carriage or with the. stationary bracket on the bed. Fig. 7 the bed of. the lathe. Any suitable means represents a am (m th t 7? 0 Fig. may be utilized for shitting the worm .26

into engagement with the worm wheels .25.- 28, so that the feed screw may be. rotated in one direction'or the other to ctiect. the cross Feed of the head forward or back and thereby move the work with reference to the tool. By having a splincd connection between the gearing and the teed screw it is possible to ellcct a transverse feed of the head by moving the feed screw itself endwise of its axis.

'lhc taper-turning attachment is connected with lhe'tool slide and also with the teed screw For the head so that; a movemento the said slide is transmitted to the teed screw, the extent. or rapidity of: movement ot" the teed screw,and therefore of the head and the work. being determined by the position of the. templet which l'orms a part of the taper-turning attiurlnnent. 'lhe attachment includes. in the illustrated emhtnliment. of the invention, a bracket 3'3 which is sooured to the. rear side of the bed of the lathe by any suitable screws or bolts, as shown in ti and shows the. means for clamping the. sections of the telescopic rod together. Fig. 8 illustrates the stationary bracket. being in etl'ectv the section on line 8 8 of Fig. (i. Fig. 9 represents the teed screw for the cross-sliding: head and illustrates in section the connection between the screw Hill the cross slide on the taper-turning attachment. Fig. l0 represents a section on the line 10-10 of Fig. 9.

The same reference characters indicate the same or similar partswherever they Referring to the drawings, the bed of the lathe is indicated at 11, and the tool slide or carriage is indicated at 1:2. The. carriage is illustrated as being provided with a flat turret 13 which in the present instance is equipped with a turning tool consisting of a bar 14 having a cutter 15. The carriage. is moved upon ways or shears indicated at 16, 17. The carriage is led by hand or by power, any suitable mechanism such as that gears 29, 30 and til, the latter being splined Figs. 1 and 2, said screws or bolts being indicated at 33. The bracket, however, may be integral with the bed instead of being at tached thereto. The bracket constitutes a support which is provided with a groove or guideway 34 for what I term a longitudinal slide 35. This slide is held against one side wall of the groove by blocks 36, 37, interposed between the slide 35 and the other side wall of the groove. The block 36 is adjusted in position by a screw pin 38, while the block 37 is adjusted by a pin 39 and a screw pin 40 hearing against the beveled end thereof, as shown in Fig. 4.

Located above the longitudinal slide there is a cross slide 41 which is held in place by a cap 42 secured upon the support. This cross slide projects into the bed through a guide 43 which is clamped to a Web on the bed, and-is adjusted relatively thereto by an adjusting screw 44. The inner end of the cross slide has a socket 45 (see Fig. 9) into which the unthreaded end of the feed screw projects. I find it convenient to provide an anti-friction bearing between the cross slide and the screw, which may take the form of a sleeve 46 secured to the screw by a pin 47. Between the .end of the sleeve and a washer 48 which bears against the inner end of the socket 45 I place antifriction balls or rollers 49; and between the other end of the sleeve and a washer 50 which bears against a collar 51 screwed into the threaded end of the socket I interpose similar balls or rollers 52. Thus I provide a thrust bearing by which the sliding movement of the cross slide is transmitted to the feed screw without friction. By removing the threaded collar 51 the cross slide may be easily detached from the feed screw.

Upon the longitudinal slide 35 I clamp a templet 53 which may be of any desired shape, according to the character of the work to be turned. As illustrated, it consists of a flat bar having parallel sides Midway between its ends it is pivoted by a pin54 to the longitudinal slide 35. Its ends are curved and rabbeted, as shown in Figs. 4 and 5, so as to be engaged by clamps 55, 55, secured to the longitudinal slide by screws 56, 56. The outer edge of each of these 7 clamps has a shoulder 57 which rests upon the longitudinal slide 35 and which serves as a fulcrum when the screws 56 are driven home so as to cause the engaging portions of the clamp to engage the templet and bind it securely upon the longitudinal slide in the position in which it may have been adjusted. The cross slide is cut away, as shown inFigs. 3 and 4, to receive the templet, and bearing blocks 58, 59- carried by the cross slide enga e the sides of the tem- The bearing Illock 58 is pivoted on the head of a Iain 60 passed into the cross slide, and the lock' 59 is pivoted on the justed, may be locked in position by a pin 2 and a screw 63, as shown by Fig. 3. The angle at which the templet 53 is set determines thetaper of the work. That will readily be understood.

The connection between the longitudinal slide 35 and the tool carriage 12 consists of a telescopic rod or link which comprises the two sections 64, 65. One section consists of a rod, while the other consists of a sleeve into which the rod extends, the sleeve section being split as shown in Fig. 7. On the split end of the sleeve I place a split ring clamp 66, the ends of which are drawn togetherby screws 67, so that'after the link has been extended or contracted its sections may be secured together against further relative movement thereof. One end of the extensible or telescopic rod is pivoted to the longitudinal slide 35 by a stud 68, and the other end of the link or rod may be connected with either the tool slide or with a bracket 69 clamped to the bed. It will be noted that the tool slide has a lug 70 with a pin 71 with which the aperture'd end of the section 65 may be engaged as shownin Fig. 6. The bracket 69 is clamped to the way orshear 17 and it, too, is provided with a pin 72 with which the apertured end of the section 65 may be engaged, as shown in dotted lines in Fig. '1. The bracket 69 is shaped to engage the way or shear 17 and is provided with a clamping member 73 secured in place by a screw 74.

In operation, the templet having been adj usted to the desired angle, the telescopic rod or link is connected to the tool carriage, and

when the carriage is fed toward the head it causes the longitudinal slide or, member 35 to move withit and thus move the templet. The longitudinal movement of the templet effects a movement of the cross slide or member 41, which, being connected to the work-carrying head, moves the work laterally with reference to the tool. In the event that the operator desires to take a second cut on the same taper, he may rotate the feed screw 22 so as to adjust the work to a new position prior to the next length feed of the work and crossfeed of the cross slide 41.

The attachment as I have described it is simple in construction and efiicient and accurate in operation without danger of lost motion between the parts. When the work is to be turned on the same diameter throughout, the extensible or telescopic rod or link is detached from the tool slide or carriage and is connected to the bracket 69 so that the templet will remain stationary during the travel of the tool slide, the cross feed of the head in this instance being secured by the gearing which I have descrlbed, or by hand.

Having thus explained one embodiment of the invention, wlthout attempting to set forth all of its forms, or all the modes 0 its use, what I claim is:

1. A taper-turning mechanism comprising a cross slide adapted to be connected to the work-carrying head, a longitudinal slide adapted to be engaged with the tool carriage and to be moved longitudinally thereby, and a templet on said longitudinal slide engaged with the cross slide.

2. The combination with a bed, a longitudinally movable tool carriage, and a transversely movable work-carrying head, of a longitudinal slide connected to said carriage to be moved thereby, a cross slide connected to said head, and a templet on and movable with said longitudinal slide and engaged with said cross slide.

3. The combination with a bed, a longitudinally movable tool carriage, and a transversely movable work-carrying head, of a longitudinal slide connected to said carriage to be moved thereby, a cross slide connected to said head, a templet on and movable with said longitudinal slide and engaged with said cross slide, and means for securing said templet on said longitudinal slide at any desired angle to its path of movement. I

4. The combination with a bed, a longitudinally movable tool carriage, and a transversely a movable Work-carrying head, of mechanism for moving said head transversely comprising a feed screw and gearing splined thereto for rotating the feed screw, a cross slide'connected with said head, a longitudinal slide connected with said carriage to be moved longitudinally thereby, and a templet on the longitudinal slide engaged with the cross slide.

5. ihe combination with a bed, a longitudinally movable tool carriage, and a laterally movable work-carryin head, of headfeeding mechanism comprising a nut on the headand a feed screw on the bed adapted to be rotated to feed the head, a cross slide connected with said screw, a longitudinal plet carried by the longitudinal ,slide in the first-mentioned slide connected with said carriage to be moved longitudinally thereby, and a templet on the longitudinal slide engaged with the cross slide. H

6. A taper-turning attachmentfor a lathe having a cross-sliding work-carrying head, said attachment comprising a support, a longitudinal slide thereon, said slide and adapted to be connected to the tool slide of the lathe, a cross slide having provisions for engagement with the cross-sliding head of the lathe, and a temengaged with said cross slide.

7 A taper-turning attachment comprising asupport, having a longitudinal guideway and a transverse guideway, a longitudina guideway, a cross slide in the second-mentioned guideway, a templet on said longitudinal slide, means for securing it on said slide at any desired angle, and means on the cross slide for engaging said tem let, whereby the movement of said longitudinal slide and the templet effect the cross movement of the cross slide.

8. A taper-turning attachment comprising a support, having a longitudinal guideway, and a transverse guideway, a longitudinal slide in the first-mentioned guideway, a cross slide in the second-mentioned guideway, a templet on said longitudinal slide, means for securing it on said slide at any deslred angle, and opposing blocks pivoted on said cross slide for embracing the templet.

9. The combination of a bed having a stud, a longitudinally movable tool carriage having a stud, a work-carrying cross-sliding-head, a longitudinal slide supported by the bed, an extensibl adjustable l1nk p1voted to said slide an adapted to be PIVOi) ally engaged with either of said studs, a cross slide supported by said bed having provision for detachably connecting it with said head, and a templet adjustably mounted on and carried by the longitudinal sl1de 1n operative engagement with the cross slide.

Intestimony whereof I have affixedmy signature, in presence of two witnesses.

" JAMES HARTNESS.

Witnesses: I

Gr W. CLARE,

J. W. WALKER, 4

a link connected to slide and 

